using python
for GUI, using tkinter.
01 setting up gui window.
02 using widget : Label.
03 positioning with tkinter grid system.
04 creating buttons.
05 creating input fields.
06 creating simple calculator.
07 using icons images and exit buttons.
08 creating image viewer app.
09 adding a status bar to exisiting image viewer app (taking the code from 08).
10 adding frames,
11 radio buttons.